How to Merge Encrypted PDF Files. Small businesses working with sensitive PDF documents may choose to encrypt those documents. An encrypted PDF is password protected, which means you cannot open ...

If you want to password-protect your PDF documents from outside interference, then maybe you should give PDF Page Lock a test run. It is a free encryption software that lets you easily encrypt PDF ...

Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

If you have a confidential PDF you want to password protect, you have a few ways to do that on your Windows 11 PC. You can use a desktop app or a web-based tool to encrypt your PDF files.

Want to encrypt your important PDF files? It's easier than you might think. Here's how to encrypt PDF files on your Mac or Windows PC.

Whether you use Windows Pro's built-in Bitlocker or the free Veracrypt utility, encrypting a file, folder, or drive is an easy way to keep your sensitive documents secure.

This post covers free tools to password protect PDF online in Windows 11/10. You can also set copy, modify, and print permissions to PDF.

How to encrypt and password-protect ZIP files the right way This tip was originally published on IDG Answers, a reader-powered help desk for answering tech questions.